peritendineum

[pĕr′ĭ-tĕn-dĭnē-əm]
n. pl. per•i•ten•din•e•a (-ē-ə)
  1. Any of the fibrous sheaths surrounding the primary bundles of fibers in a tendon.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.